Rubber mounting

Abstract

A rubber mounting which has a hydraulic damping device for damping vibrations of a predetermined frequency including a working and equalization chamber (6, 4) joined by a connecting passage (10) and filled with a hydraulic liquid. The connecting passage (10) is channel-like configured and dimensioned such that when subject to vibrations of the frequency to be damped the enclosed liquid volume can be made to resonate and such that the connecting passage (10) is narrowed to a throttle (12) only in the area of a point which is narrowly defined in axial direction.

What is claimed is: 
     
       1. A rubber mounting which has a hydraulic damping device for damping vibrations of a predetermined frequency and which has an axial direction comprising: working and equalization chambers joined by a connecting passage and filled with a hydraulic liquid, the working chamber being limited by an elastomeric member, the connecting passage being channel-like configured and dimensioned such that when subject to vibrations of the frequency to be damped, the enclosed liquid volume resonates and that the connecting passage is narrowed to a throttle only in the area of a point which has a throttle flow cross section and which has a throttle length in the axial direction, the length being smaller than a diameter d resulting from a circle formula πn 2  /4 based on the surface of the throttle flow cross section, the connecting passage having a flow cross section and the ratio of the flow cross section of the connecting passage and the flow cross section of the throttle being between 2:1 and 6:1. 
     
     
       2. A rubber mounting in accordance with claim 1, in which the throttle is in an area of an inlet and outlet of the connecting passage. 
     
     
       3. A rubber mounting in accordance with claim 1, in which the throttle is configured as a diaphragm. 
     
     
       4. A rubber mounting in accordance with claim 1, which includes a regulating device and in which the throttle is adjustable with respect to its flow cross section by means of the regulating device. 
     
     
       5. A rubber mounting in accordance with claim 4, which includes a regulating device for the calibrating and in which the regulating device has a front end which can approach the throttle. 
     
     
       6. A rubber mounting in accordance with claim 4, which includes a regulating device for the calibration and in which the regulating device has a front end which can be immersed into the throttle. 
     
     
       7. A rubber mounting in accordance with claim 4, which includes an actuator to carry out the adjustment and that the actuator is activated via signals. 
     
     
       8. A rubber mounting in accordance with claim 1, which includes a regulating device and in which the throttle has a flow cross section which can be continuously calibrated between a minimum and a maximum value by means of the regulating device.